Malicious PDF — malware analysis report

Static analysis result for SHA-256 176210abd6864373…

MALICIOUS

PDF

100.2 KB Created: 2021-05-01 23:36:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e8695053a03b545bf29d7bca801c2be9 SHA-1: 5d4f8cb3ffa70550a0df292ae2675267d65e95eb SHA-256: 176210abd6864373afcba2e05f450f4c1ddbb432af9bd1be471f8d68edf4c44c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://xajibur.ru/strik?utm_term=how+to+study+dentistry+in+usa+for+international+students PDF link annotation
    • https://cdn.sqhk.co/ramidazumiko/aLgWjha/dash_dog_treat_maker_amazon.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/96298596021.pdfIn PDF document text
    • http://bosemefawixuwov.mypressonline.com/kikusinukewuleme.pdfIn PDF document text
    • http://zakababonedip.iblogger.org/bawuxinonixogerejojuxol.pdfIn PDF document text
    • https://cdn.sqhk.co/nezipumosot/hK8hdEF/box_office_definition_synonym.pdfIn PDF document text
    • http://maretexojud.66ghz.com/tenukeluwonopujo.pdfIn PDF document text
    • https://cdn.sqhk.co/lulufebexefe/fgdrlja/99814232765.pdfIn PDF document text
    • http://zemawage.22web.org/framework_3._5_for_windows_8_free.pdfIn PDF document text
    • https://cdn.sqhk.co/xubupigegi/k7iaznm/mubipelojinasub.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/cateter_venoso_central_cuidados_de_enfermeria.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/sketchup_make_download.pdfIn PDF document text
    • http://majusenise.sportsontheweb.net/pipexulenuzuvatila.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mokineso.epizy.com/74247663127.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eb648b7-15af-4203-b74c-80d304545345/dorogawijoxelon.pdfIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_1fb2da4f677049d482177a02d601f655.pdf?index=trueIn PDF document text
    • http://medexode.atwebpages.com/48335850539.pdfIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_776c36bb52d84cd58a9d5f53113daedc.pdf?index=trueIn PDF document text
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_3a6d1e7c46e742f0828ccc5b0d2e4696.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69513e9f-49ec-4752-be02-42188e448161/justin_guitar_for_what_its_worth.pdfIn PDF document text
    • https://bc80c028-b71a-4936-8b52-739d97125464.filesusr.com/ugd/fb4f66_f9d26a4eea254763ad4f2296f2e2042c.pdf?index=trueIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CA0 4936 bytes
SHA-256: 6c469403a732c203159ebc4177c53846f96c5d722e2fb4aa82ae998c58d79114
font_01_sfnt_off00014d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D7E 11824 bytes
SHA-256: 651fe76a9031bebacf76dfc4a29c24303aaf00a5baf8bff41954b6a61987e61e
font_02_sfnt_off00017527.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17527 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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